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<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
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    <title>Document</title>
</head>

<body>
    <script>
        var arr = [2, 1, 6, 8, 10, 99];
        var max = arr[0];
        var min = arr[0]
        for (var i = 1; i < arr.length; i++) {
            if (arr[i] > max) {
                max = arr[i];
            } else if (arr[i] < min) {
                min = arr[i];
            }

        }
        console.log('该数组里面最大值是：' + max);
        console.log('该数组里面最小值是：' + min);
    </script>
</body>

</html>